OK......here's the latest, rebuilt Perko 493 sea strainer, new hoses to seacock.... no problem. Heat exchanger great water flow, new raw water impeller. Thermostat opened up in a hot pan of water (they either work or they don't...right??).......This leaves me two things, elbow and the closed loop impeller. I know I probably should of tackled the elbow first.....but wanted to rule out all others first. Any way to check mixing elbow without taking it off?? I know I could take it off and band saw it like the pic Ralph posted....but if it was good??
If it's the original, then it is most likely bad. I don't think you want to cut it out. In my case, if I had done that, I wouldn't have been able to re-use it. Here is how I got mine off w/o cutting.
1) Remove s/s bands (obvious)
2) Take a heat gun and soften it up all around
3) Take a flat s/s putty knife (not wide), and try to stick it in. If not, use a small screwdriver and gently hammer it in enough (like 1") to open it up.
4) Spray WD-40 in the crevase
5) Repeat #3-#4 and go all the the way around after moving 1/2 inch
6) Heat it up again and try to twist it (manually), or use a oil filter strap wrench.
It was tricky, but it eventually came out. Good luck!
